PERC 5 Features 23ConfigurationYou can use the storage management application to select the Patrol Read options. Use Patrol Read optionsto set automatic or manual operation, or disable Patrol Read. The following sections describe Patrol Readfunctions and operations available in the Storage Management application.NOTE: See the storage management application’s documentation for more information about the Patrol Readconfiguration features available.Patrol Read ModesThe following describes the scheduling details for Patrol Read:1 By default the controller sets the Patrol Read to Auto mode. You can set the Patrol Read to either Autoor Manual mode.2 In Auto mode, Patrol Read runs continuously on the system and is scheduled to start a new Patrol Readwithin seven days after the last iteration is completed.3 When Patrol Read Mode is changed from Auto to Manual, or Auto to Disabled, the Next executionwill start at: field will be set to N/A.Behavior DetailsThe behavior details of Patrol Read are as follows:1 Setting Patrol Read in Manual mode does not start Patrol Read. It only sets the mode so that you canselect Start whenever you want to run Patrol Read. When the mode is set to Manual, it remains in thatmode until you change it.2 Setting the mode to Automatic starts Patrol Read. When the Patrol Read operation is complete, it willset itself to run within seven days of the last iteration.Blocked OperationsIf any of the following conditions exist, then Patrol Read will not run on any of the affected disks:• An unconfigured disk (the disk is in the READY state)• Disks that are members of a virtual disk undergoing a reconstruction• Disks that are members of a virtual disk undergoing a Background Initialization or Consistency CheckDell_PERC5_UG.book Page 23 Tuesday, February 13, 2007 6:02 PM
